All Aluminum Luggage We combined a 100% aluminum alloy shell with a zipperless aluminum frame to create a solid luggage body. With aluminum alloy reinforced corners, the suitcase is more resistant to impact. Multi-stage adjustment to meet different heights Ultra smooth 360° spinner wheels：The spinner wheels are impressively quiet and glide smoothly. The wheels make pushing the aluminum carry on luggage around super effortless and fast. The wheels are also removable. One-Click Open TSA certified lock Password protection design: prevent the combination lock from being changed without your knowledge Adopt TSA certified lock (keyless), allowing you to pass customs inspection quickly, saving time. It is recognized in 650 airports in 44 countries that 2 billion passengers use TSA locks every year. You use the password to open the luggage, the initial password is 0-0-0, you can change the password according to the instructions. Reasonable storage partition The interior of this hardshell luggage is composed of a fully enclosed privacy storage area and a quick release storage area, equipped with dry/wet separation pockets to meet various travel needs